Today I went to a music store.
I found a used CD I wanted. When I went to the counter, the cashier said the used CD was "pre-owned".
I asked him if I left the store with the CD, would he consider it "owned"? He said yes.
Then I asked him what he would think if I returned it. Would that be considered "post-owned"?
He said if I returned it, the CD would resort back to being "pre-owned".
I'm pretty sure that logic somehow defies Einstein's laws of space-time.